Offset of the line of sight component of the velocity distribution from circularly Keplerian values on the disk surface in the hydrodynamic simulations, in the same model presented in Fig. 3. Snapshots are calculated for four different azimuthal positions of the planet of the 2000th orbit. The velocity difference is in the range of −7.92 − 4.88   kms^-1. Here the inclination angle is taken to be i = 40° and the viewing angle is taken to be −90°, i.e. the disk is seen from the bottom of Fig. 3. The planetary orbit is shown with a red dashed circle. Two permanent high-velocity regions can be seen at position angle 0° and 180°, and a variable pattern in the vicinity of the planet orbits. The strength of the variable component can reach that of the permanent one, e.g., in the panel at the bottom left (planet is at position angle 180°).